Device for debarking stave and head bolts



July 16, 1963 C. T. CALK Filed July 6. 1,960

3 Sheets-Sheet 1 as 7a l a2 asl 6s- 76 /06 74,

62 3a s2 26 o 50 54 524 o e o o 5 l1 64 R p56o o L 4a 4o 44 4a a., ww; Vf @s #i1-w@ *L+ L .90T 'pi' L. l @5935@ l /f '-iihzk; A.

CHARLES 7'. GALK INVENTOR im Lw y F1621. 3*- BY am mO/b ATTORNEY July 16, 1963 c. 1'. cALK 3,097,676

DEVICE FOR DEBARKING STAVE AND HEAD BOLTS Filed July 6. 1960 5 Sheets-Sheet 2 l J I 1114/1/11Il/l/g/(lllll1l1111/111111lllllr//lllglllllll fill/111111,11 n

OHARLES 72 @ALK INVENTOR ATTORNEY July 16, 1963 c. T. cALK DEVICE FOR DEBARKING STAVE AND HEAD BOLTS Filed July e. 1960 3 Sheets-Sheet 5 CHARLES 7T GALK INVENTOR ATTORNEY United States Patent Office 3,097,676 Patented July 16, 1963 Filed `luly 6, 1960, Ser. No. 41,143 3 Claims. (Cl. 1144-208) This winvention relates .generally to power driven shears,

.and vspecifically to alhydraulically actuated device for debarking stave andihead bolts.

In .the cooperage, or barrel `and keg manufacturing in- .dustry, oaken logs are sawn into .short standard lengths and then split into quarters. These quarters are commonly known asbolts. The bark must .then be removed before sawing the bolts into staves and head boards.

Because the logs are dragged considerable distances over the ground their bark becomes packed with small stones and abrasive dirt both :of which are extremely .destructive to sawing machinery o-f the cooperage mills.

-It has been determined that no more than three bolts,

yfrom which the bark has not been removed, can be cut into staves before it becomes necessary to shut-down in order to resharpen the saws. Consequently,1it is imperative to remove the bark from the bolts, and in many cooperage mills this operation is performed manually.

This particular task is expensive and time consuming and greatly limits the output of the Acooperage mills.

It is, therefore, a primary object of the present invention to provide a comparatively inexpensive and simple `machine which will very rapidly and effectively remove bark from bolts.

Another `object of this invention is to provide a unique stave and head bolt debarking machine which iseconornical to manufacture, efcient and reliable in operational use, and which is easy to assemble and disassemble for maintenance andcare.

These and other objects and advantages ofthis invention will become more readily apparent from the following speciiication and accompanying drawings wherein:

FIG. 1 is a f-ront elevation of the stave and head bolt debarking ymachine incorporating features of this invention;

FIG. 2 is a fragmentary vertical cross-section taken along line 2-2of -F-IG. l;

FIG. 3 is a full vertical cross-section taken along line 3 3 of FIG. l;

FIG. 4 is a fragmentary vertical cross-section taken along line 4 4 of FIG. l;

FIG. 5 is a horizontal cross-section taken along line 5-5 of F IG. l;

FIG. 6 (sheet 2) is a fragmentary detail cross-section taken along line 6--6 of FIG. 4;

FIG. 7 is a fragmentary section taken along line 7-7 of FIG. 3 in order to more fully illustrate the appearance of the bolts which are prepared for sawing by the stave and head bolt debarking machine; and

F-IG. 8 is a schematic diagram of the hydraulic system of the stave and head bolt debarking machine of the present invention.

l'Referring now to FIG. 1 of the drawings, there is shown a stave and head bolt debarking machine 110 which comprises basically a structural vsupporting frame 12, a bolt supporting table 14, and an hydraulic cylinder 20` which supports and drives a blade assembly 34.

As best illustrated in FIGS. l and 3, a pair of vertical columns 16 are spanned at their upper ends by a pair of spaced channel shaped cross-members 18. The hydraulic cylinder is suspended from the lower iianges of cross-members 18 by bolts 26, and a plate 22 which is welded to the cylinder 20 and further secured by gussets 24.

A heavy rectangular ange plate 30 is secured to :the lower surface of a piston 28 of the vcylinderlt) bya circle of recessed cap screws 32.

The blade assembly '34, which is suspended from plate 30 by bolts 38, consists of a heavy gauge elongated rectangular plate 36 to which is welded an arcuate .blade mounting plate 4G. A curved blade 42, kwhich -has its lower end 46 ground to a knife edge is fastened to plate 4i) `by `a plurality of bolts 44.

The curvature of blade 42 corresponds approximately to what has been found to be the average radius of the bolts passing through a cooperage mill, thus insuring that the bark will be sheared away from the majority of bolts with but a single pass of the blade, thereby reducing material and time loss to a minimum.

lIn order to prevent rotation of the blade assembly 34 during a shearing operation of a bolt, Seach of:a`.pairiof vertical guide rails 56 is secured, by a plurality of recessed cap screws 58, to the inner surface of .columns 16. A pair of laterally extending guide arms 48 are fastened,

i by boltsSll (FIG. 3) to the ends of plate 36.

T he outer ends of arms `48 are arrangedto secure, by means of cap screws 54 (FIG. 2), a pair of bronze guide Vblocks 52, one on each side of rail 56.

The left hand guide arm, as viewed in FIG. 1carries a bracket 62 which supports a cam rod 60 by means of bolts |64. The rod -60 carries a pair of cam blocks 66 and 68 whose spacing corresponds to the stroke of piston 28. Their function will be described subsequently. As can best be noted in FIGS. l and 6, cam blocks 66 and 68 are Vadjustably maintained on rod 6? by .cap screws '7-0 kwhose heads are received by a shouldered or stepped slot 72.

As will be noted in FIGS. l and 4, a pair of angle iron legs'74 are welded to a structural gusset "76, the purpose of the legs 74 being to support bypass valves 80 and 82 whose function will be described subsequently along with cam blocks `66 and 68.

Finally, a manually operated control valve is bolted to a mounting plate 92 which is welded to the right hand column 16, as viewed in FIG. 1.

The sequence of operation of the stave and head bolt debarking machine 10l will now be describe-d. A bolt is ldelivered to the table 14 by means of a conveyor (not shown) and it is aligned under the blade 47. by one of a pair of operators. A second operator then moves a control handle 94 downwardly thereby permitting valve 90 to pass hydraulic fluid from a supply line 96 to a line 100 connected to cylinder Ztl. The hydraulic `fluid pressure in the cylinder 2l)l causes the piston 28 to be ydriven downwardly, thereby causing blade 42 to shear away the bark from the bolt.

The duid in the lower portion of cylinder 201 is expelled through a line 102 and the valve 90` to a return line 98. As the piston 28 continues downwardly in the cylinder 20', the rod 60 is also carried downwardly therewith and as the piston 28 approaches the end of its stroke, cam block `66 engages a plunger '88 to open the bypass Valve 82. The fluid from line 108 will now be ydivided to return line 98 through a bypass line 104, valve 82, and line 108, and the travel of the piston 28- in the cylinder 20 will cease.

The operator will now move the control handle 94 up- Wardly to cause the iluid from the supply line 96 to be fed through valve 98 and line 102 to cylnider 201, thus driving the piston 28 upwardly. Fluid in the upper portion of cylinder 20E will be expelled through line 100` and the valve 90 to the return line 98.

As the piston 28 moves upwardly in the cylinder 20, the rod 60 is carried upwardly and as the piston 28` nears the end of its upstroke, cam block 68 engages a plunger 86 to open the bypass valve 80. The fluid from the line 3 102 will now be .diverted to the return line 98 through a bypass line 106, valve 80, and line 108. It should be noted that as block 66 or 68 engages plunger 86 or 88, respectively, rod 60` is prevented from being deflected away by means of a guide channel member 78 whose sides are welded to the legs `74.

Obviously, many variations and modifications of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

1. A stave and head bolt debarking machine, comprising, a structural supporting framet having a pair of spaced vertically extending guide tracks, a carriage mounted for reciprocating movement in said guide tracks, a hydraulic cylinder secured vertically at and between the upper ends of said guide tracks and having a piston connected to said carriage for driving and retracting said carriage along said guide tracks, a support positioned at the lower ends of said guide tracks for supporting and positioning a bolt to be debarked, blade means secured to said carriage and spaced above said support for debarking said bolt upon downward movement of said carriage, said blade means including a blade which is arcuately shaped in its horizontal plane and has a cutting edge of corresponding curvature facing said support, and iluid circuit means for controlling the operation of said machine, said circuit means including a source of iluid pressure, a iluid supply control circuit having a rst iluid line connected to one end of said cylinder, a second fluid line connected to the other end of said cylinder, and valve means for controlling the direction of fluid flow through said lines, said rst and second fluid lines thereby serving alternately to supply and receive, respectively, fluid from said cylinder, and a bypass circuit including bypass means situated remotely with respect to said valve means, said by-pass means being responsive to pre-determined stroke positions of said carriage, a fluid by-pass line connected from said rst fluid line and said second iluid line to said by-pass means, and fluid passage means from said by-pass means to said source of iluid pressure, whereby upon actuation of said by-pass means by said carriage, lluid is diverted from said cylinder to said ybypass circuit thus causing the movement of said piston to halt.

2. The debarking machine of claim 1, wherein said carriage includes a horizontally positioned flange plate means secured to the lower end of said piston and a blade mounting plate mounted vertically on said llange plate means, said mounting plate having an arcuate shape corresponding to that of said Iblade and having means adapted to hold said blade in abutting contact with said flange plate means and said mounting plate downwardly ffrom said ilange plate means to a distance intermediate therewith and the cutting edge of said blade.

3. A stave and head bolt debarking machine, cornprising, a structural supporting frame having a pair of spaced, vertically extending guide tracks, a carriage mounted for reciprocating movement in said spaced guide tracks, lluid circuit means including a cylinder having a piston mechanically connected to said carriage for driving and retracting said Icarriage along said spaced guide tracks, an arcuate shaped blade, said carriage including a horizontally positioned flange plate means secured to the lower end of said piston and a blade mounting plate mounted Avertically on said flange plate means, said mounting plate having an arcuate shape corresponding to that of said blade and having means adapted to hold said blade in abutting contact with said ilange plate means and said mounting plate downwardly from said flange plate means to a distance intermediate therewith and the cutting edge of said blade, said tluid circuit means including a ilrst iluid line connected to said cylinder for passing iluid for advancing said piston and a second fluid line connected to said cylinder for passing fluid for retracting said piston, a lluid by-passing device for each said rst and second luid lines, means for opening the respective by-passing devices to pass lluid on predetermined stroke limits of said piston in said `cylinder to halt movement of said piston, and a support positioned at the lower end of said spaced guide tracks for supporting and positioning a bolt to be debarked, whereby upon downward movement of said carriage said bolt is debarked by said arcuate shaped blade.

References Cited in the le of this patent UNITED STATES PATENTS 875,849 Rishel et al. Ian. 7, 1908 1,866,348 Ferris July 5, 1932 2,580,735 Dagenais Ian. 1, 1952 2,704,093 Brown Mar. 15, 1955 2,839,105 Gantenbine June 17, 1958 FOREIGN PATENTS 1,033,889 Germany July 10, 1958 

3. A STAVE AND HEAD BOLT DEBARKING MACHINE, COMPRISING, A STRUCTURAL SUPPORTING FRAME HAVING A PAIR OF SPACED, VERTICALLY EXTENDING GUIDE TRACKS, A CARRIAGE MOUNTED FOR RECIPROCATING MOVEMENT IN SAID SPACED GUIDE TRACKS, FLUID CIRCUIT MEANS INCLUDING A CYLINDER HAVING A PISTON MECHANICALLY CONNECTED TO SAID CARRIAGE FOR DRIVING AND RETRACING SAID CARRIAGE ALONG SAID SPACED GUIDE TRACKS, AN ARCUATE SHAPED BLADE, SAID CARRIAGE INCLUDING A HORIZONTALLY POSITIONED FLANGE PLATE MEANS SECURED TO THE LOWER END OF SAID PISTON AND A BLADE MOUNTED PLATE MOUNTED VERTICALLY ON SAID FLANGE PLATE MEANS, SAID MOUNTING PLATE HAVING AN ARCUATE SHAPE CORRESPONDING TO THAT OF SAID BLADE AND HAVING MEANS ADAPTED TO HOLD SAID BLADE IN ABUTTING CONTACTING WITH SAID FLANGE PLATE MEANS AND SAID MOUNTING PLATE DOWNWARDLY FROM SAID FLANGE PLATE MEANS TO A DISTANCE INTERMEDIATE THEREWITH AND THE CUTTING EDGE OF SAID BLADE, SAID FLUID CIRCUIT MEANS INCLUDING A FIRST FLUID LINE CONNECTED TO SAID CYLINDER FOR PASSING FLUID FOR ADVANCING SAID PISTON AND A SECOND FLUID LINE CONNECTED TO SAID CYLINDER FOR PASSING FLUID FOR RETRACTING SAID PISTON, A FLUID BY-PASSING DEVICE FOR EACH SAID FIRST AND SECOND FLUID LINES, MEANS FOR OPENING THE RESPECTIVE BY-PASSING DEVICES TO PASS FLUID ON PREDETERMINED STROKE LIMITS OF SAID PISTON IN SAID CYLINDER TO HALT MOVEMENT OF SAID PISTON, AND A SUPPORT POSITIONED AT THE LOWER END OF SAID SPACED GUIDE TRACKS FOR SUPPORTING AND POSITIONING A BOLT TO BE DEBARKED, WHEREBY UPON DOWNWARD MOVEMENT OF SAID CARRIAGE SAID BOLT IS DEBRAKED BY SAID ACUATE SHAPED BLADE. 